Hyperspectral cameras can simultaneously collect high spatial resolution and high spectral imaging when used for making closeup photographs. As a nondestructive testing method, hyperspectral technology can make some indistinguishable patterns visible. In this article, hyperspectral camera was used to analyze a Qing Dynasty painting, Lundaotu (“Discussion of doctrines”) by Zhang Shibao. Digita land hyperspectral images were collected, using a model VNIR400H camera. The image and the handwriting were enhanced by using MNF(Maximum Noise Fraction), PCA (Principal Components Analysis) methods and a mask and finally a highresolution image was created. As a result, it is found in this painting two hidden messages that could not be seen with the naked eye.